When you've been steadily partaking of alcohol, hash cookies, bongs etc in the seated position, only to realise upon standing up that you're too goddamn wasted for your legs to be capable of fulfilling their normal function. Derived from the practice of painting on (or using decals to represent) non-functional elements to decorate cars (eg bullet holes), model aircraft (eg instrument panels) and so forth.
I thought I was still OK until I went to take a dump with my legs painted on and ended up shitting myself in the hallway.
Girl: Let's take this to the bedroom.
Guy: AllRIGHT! Yeah baby -- oh shit, your legs are painted on, I'm gonna have to drag your ass.
I can't believe you survived that bike ride with your legs painted on, man, you puked all over my garage and went to sleep on a wheel ramp.
Finish a task aggressively, trying really hard to get it done. Comes from basketball, where players must aggressively drive to the hoop from within the painted region of the court.
Bill is all about makin' his cash, hustlin' to the top. He likes to go hard in the paint.
When you get a lap dance and there is a skidmarkleft on your leg when the girl is done.
Brah!, I love your mom but you got to tell her to stop giving alaskan paintjobs to her clients. If she does that shit, pun intended, again she is fired.